XML 71 R61.htm IDEA: XBRL DOCUMENT
v3.20.1

Investments - Schedule of Available for Sale Securities Reconciliation (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($)
Debt Securities, Available-for-sale [Line Items] |
Cost | $ 4,572
Unrealized Gain | 1
Unrealized Loss | (48)
Fair Value | 4,525
Short-term Investments [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 393
Unrealized Gain | 1
Unrealized Loss |
Fair Value | 394
Short-term Investments [Member] | U.S. Treasury Notes [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 302
Unrealized Gain | 1
Unrealized Loss |
Fair Value | 303
Short-term Investments [Member] | Corporate Bonds and Commercial Paper [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 91
Unrealized Gain |
Unrealized Loss |
Fair Value | 91
Long-term Investments [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 4,179
Unrealized Gain |
Unrealized Loss | (48)
Fair Value | 4,131
Long-term Investments [Member] | U.S. Treasury Notes [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 1,569
Unrealized Gain |
Unrealized Loss | (2)
Fair Value | 1,567
Long-term Investments [Member] | Government Agency Bonds [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 1,548
Unrealized Gain |
Unrealized Loss | (23)
Fair Value | 1,525
Long-term Investments [Member] | Corporate Bonds [Member] |
Debt Securities, Available-for-sale [Line Items] |
Cost | 1,062
Unrealized Gain |
Unrealized Loss | (23)
Fair Value | $ 1,039

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References No definition available. + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_OtherLongTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=PWFL_CorporateBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |